Fungus Beauveria bassiana reduces root-knot nematode action in tomato plants

Fermented fungus beauveria bassiana inhibit egg hatching and reduce the survival of juveniles Meloidogyne incognita, scientists indicate. The tests were carried out in the laboratory and on tomato plants, with the application of the fungus or its fermentation broths.

In vitro bioassays showed that the fermented broth of B. bassiana compromises the initial development of the nematode. The presence of the extract also caused a strong repellent effect on second-stage juveniles, according to olfactometer tests.

In plant experiments, application of the fungus or fermented broth reduced root colonization by M. unexplained. The effect coincided with the increase in defense hormones in tomato plants, suggesting induced systemic action.

The results indicate that the use of fermented B. bassiana can integrate nematode management with a focus on sustainability. In addition to direct action on the pathogen, the strategy activates the plant's natural resistance mechanisms. The approach paves the way for the development of biological solutions that are less aggressive to the environment.

More information at doi.org/10.1002/ps.8948